2006420209 has 2 divisors, whose sum is σ = 2006420210. Its totient is φ = 2006420208.

The previous prime is 2006420191. The next prime is 2006420219. The reversal of 2006420209 is 9020246002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1980695025 + 25725184 = 44505^2 + 5072^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006420209 - 2¹³ = 2006412017 is a prime.

It is not a weakly prime, because it can be changed into another prime (2006420219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003210104 + 1003210105.

It is an arithmetic number, because the mean of its divisors is an integer number (1003210105).

Almost surely, 2^2006420209 is an apocalyptic number.

It is an amenable number.

2006420209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006420209 is an equidigital number, since it uses as much as digits as its factorization.

2006420209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2006420209 is about 44793.0821556186. The cubic root of 2006420209 is about 1261.2677692952.

The spelling of 2006420209 in words is "two billion, six million, four hundred twenty thousand, two hundred nine".